Copyright(C) 1994 Terumasa KODAKA , Takeshi KONO
■PC-98GS SGP BIOS
INT 1Fh - Function 00h
Classification SGP BIOS
Name Reading SGP work RAM
Undocumented
Target PC-98GS
Input AH=00h
ES:DX=Buffer address
CX=Number of elements to read (6-byte units)
Output CF=0
Explanation o Read data from SGP work RAM.
SGP (Super Graphic Processor) is a graphics processor installed in PC-98GS.
Since the specifications are undisclosed, it is unknown what data can be read using this BIOS.
It does not mean that the contents written with INT 1Fh - Function 01h can be read.
o Can only be used when 0000:0597 bit 7=1.
Related INT 1Fh - Function 01h
0000:0597h bit 7
I/O A562h
INT 1Fh - Function 01h
Classification SGP BIOS
Name Write to SGP work RAM
Undocumented
Target PC-98GS
Input AH=01h
ES:DX=buffer address
CX=number of bytes to write (6-byte units)
Output CF=0
Explanation o Write data to SGP work RAM.
SGP (Super Graphic Processor) is a graphics processor installed in PC-98GS.
Since the specifications are not disclosed, the format of the data transferred using this BIOS is unknown.
o Can only be used when 0000:0597 bit 7=1.
Related INT 1Fh - Function 00h
0000:0597h bit 7
I/O A562h
■High-resolution mode multitasking interrupt
INT 1Fh - Function 80h Subfunction 00h
Classification Multitasking interrupt
Name Keyboard BIOS idle interrupt
Target High-resolution
Input AX=8000h
Output CF=End condition
Explanation o Called when the keyboard BIOS is waiting for key input.
The BIOS processing changes depending on the CF state when it returns.
For details on the processing content, see the "Explanation" column of INT 18h - Function 00h.
o There is no processing routine for this function in the BIOS.
This interrupt is defined for applications and drivers to hook.
Related INT 18h - Function 00h
INT 1Fh - Function 81h
INT 1Fh - Function 88h
INT 1Fh - Function 80h Subfunction 18h
Classification Multitasking compatible interrupt
Name BRANCH BIOS idle interrupt
Undocumented
Target Hi-Res
Input AX=8018h
Output CF=End condition
Explanation o Details unknown. BRANCH BIOS processing changes depending on the CF state when it returns.
o There is no processing routine for this function in the BIOS.
This is an interrupt defined for applications and drivers to hook.
Related
INT 1Fh - Function 81h
Classification Multitasking compatible interrupt
Name Call from interrupt handler
Undocumented
Target Hi-Res
Input AH=81h
AL=Device type
00h: Call from keyboard interrupt handler
18h: Call from BRANCH4670 interrupt handler
40-43h: Unknown
44-47h: Unknown
48-4Bh: Unknown
4C-4Fh: Unknown
Output None
Explanation o When one character is stored in the key buffer, the keyboard interrupt (INT 09h) handler calls with AL=00h.
For the timing of the call, see INT 1Fh - Function 88h.
o The BRANCH BIOS external interrupt handler is called with AL=18h.
It may also be called with AL=40-4Fh, but the details are unknown.
o There is no processing routine for this function in the BIOS.
This is an interrupt defined for applications and drivers to hook.
Related INT 1Fh - Function 80h
INT 1Fh - Function 88h
INT 1Fh - Function 82h
Classification Multitasking compatible interrupt
Name Interrupt when printer is BUSY
Target Hi-Res
Input AH=82h
AL=Device type
08h: Printer
4C-4Fh: Unknown
Output None
Description o When sending to the printer with INT 1Ah - Function 14h, if the printer is in a BUSY state,
this is called with AL=08h. For the timing of the call, see INT 1Ah - Function 14h.
o It may be called with AL=4C-4Fh, but the details are unknown.
o There is no processing routine for this function in the BIOS.
This is an interrupt defined for applications and drivers to hook.
Related INT 1Ah - Function 14h
INT 1Fh - Function 83h
Classification Multitasking compatible interrupt
Name Received interrupt occurrence notification
Target Hi-Res
Input AH=83h
AL=Interrupt occurrence channel number
10h: Received data from RS-232C CH#0
11h: Received data from RS-232C CH#1
12h: Received data from RS-232C CH#2
18h: Executed processing for BRANCH4670 socket 80h
19h: Executed processing for BRANCH4670 socket 90h
1Ah: Executed processing for BRANCH4670 socket A0h
1Bh: Executed processing for BRANCH4670 socket B0h
40-43h: Unknown
Output None
Explanation o Executed processing for RS-232C from INT 19h - Function When initialized at 07h (extended mode),
the RS-232C interrupt handler is called at AL=10-12h at the end of each receive interrupt (just before IRET).
o The BRANCH BIOS external interrupt handler is called at AL=18-1Bh. It may also be called at AL=40-43h, but the details are unknown.
o There is no processing routine for this function within the BIOS.
This is an interrupt defined so that applications and drivers can hook it.
Related INT 19h - Function 07h
INT 1Fh - Function 88h
Classification Multitasking compatible interrupt
Name Call from keyboard interrupt handler
Target Hi-Res
Input AH=88h
AL bit 7: Make/Break
1= Make (key pressed)
0= Break (key released)
AL bit 6-0: Key code of the key whose state has changed
BL= Shift key flag state at the time of interrupt occurrence (0000:053Ah)
Output CF= Notification of key processing method
1= Make the keyboard interrupt handler skip processing
0= Make the keyboard interrupt handler process
Explanation o When a key is pressed or released (state changes), this function is called from within the keyboard interrupt (INT 09h) handler.
At this time, the Make/Break state and key code of the key are set in AL, and the state of the shift key flag at that time is set in BL.
o There is no processing routine for this function in the BIOS.
It is an interrupt defined for applications and drivers to hook.
o By hooking this function, you can skip the processing of the keyboard interrupt handler when a specific key is pressed (released).
When this function is called, if the key code of the key you want to skip is set, it sets CF=1 and returns.
Then the keyboard interrupt handler will not process that key.
However, in the 80x86 CPU, when an internal interrupt (INT) is executed, the flag state is saved,
so to notify the caller of INT of the state with the carry flag, it is necessary to manipulate the flag on the stack.
A program example is shown in Table [Example of INT 1Fh - Function 88h Handler].
u The technical data book mentions the existence of this function, but does not show how to use it specifically.
u In high-resolution mode, when a key is pressed (released), the following processing is performed.
1. When a key is pressed (Make) or released (Break), the keyboard transmits the key code of the key
whose state has changed and the Make/Break state to the main unit as serial data.
When the main unit's keyboard interface (8251A) receives data from the keyboard, it generates an interrupt (INT 09h).
When the CPU accepts the interrupt, it executes the keyboard interrupt (INT 09h) handler and performs the following processing.
2. First, it obtains the status of the 8251A and determines whether there is a receive error.
If there is an error in the received data (framing error, overrun error, or parity error), it performs the following processing.
It requests the keyboard to resend the data. It receives the received data with the error from the 8251A and discards it.
It ends the interrupt handler.
The number of errors that occur is counted, and up to three retries are performed.
If a receive error occurs four or more times, it gives up on the retries, ignores the error,
and continues the following processing.
3. If there is no receive error, it receives the received data from the 8251A.
Based on this, the press status table at 0000:052A to 0539h is updated.
4. Set the received data in AL and the current shift key flag status in BL, and execute INT 1Fh - Function 88h.
5. If CF=1 as a result of executing INT 1Fh - Function 88h, do not perform processing from 6 onwards for that received data.
Immediately terminate the interrupt handler.
If CF=0, continue with the following processing.
6. Refer to the internal interrupt key setting table at 0000:0418h, if the received data is a key that will
generate an internal interrupt, execute INT 05h or INT 06h and then terminate the interrupt handler.
7. Refer to the shift key definition table at 0000:0408h, if the received data is a key defined as a shift key,
update the shift key press status flag at 0000:053Ah and then terminate the interrupt handler.
8. If the received data indicates Break, the interrupt handler ends here.
9. If the received data indicates Make, the shift key state and the received data are added to the key buffer.
If the key buffer overflows, no data is added, a beep (2 kHz, 100 ms) is sounded, and the interrupt handler ends.
10. At this point, if there is one character of key input data in the buffer, INT 1Fh - Function 8100h is executed.
11. The interrupt handler ends.
Table INT 1Fh - Function 88h handler example
NewInt1F88 PROC FAR
;To ignore pressing [HOME] on the XA keyboard
;(Do not check the shift state)
cmp al,5Eh + 80h ;MAKE HOME
jne IsNotHOME
;Set the carry flag on the stack to 1
push bp
mov bp,sp
or [bp+06h],BYTE PTR 01h ;CF=1
pop bp
IsNotHOME: iret
NewInt1F88 ENDP
Related INT 1Fh - Function 80h
INT 1Fh - Function 81h
INT 09h
0000:053Ah
INT18KB.TXT key code and key data table
■Resume control
INT 1Fh - Function 8B00h
Classification RESUME BIOS
Name Resume processing for EMM386
Target PC-9801NS/E, NC, NL, NS/L, NA
Input AX=8B00h
Output None
Explanation o If the power is turned on under the following conditions, the BIOS issues this function immediately after the power is turned on.
・Resume function is ON
・0000:0400h bit 4=1
o Used by the BIOS to notify the EMS driver using virtual 86 mode (hereafter abbreviated as V86EMS driver) that the power has been turned on.
EMM386.SYS (resume-compatible version) and EMM386.EXE trap this function. When EMM386 is installed, executing this function will turn on the
virtual 86 mode that was released with INT 1Fh - Function 8C00h again.
There is no processing routine for this function in the BIOS.
o When resuming with the V86EMS driver installed, if you turn the power off while in virtual 86 mode, the virtual 86 mode-related state cannot be
restored when the power is turned on again (if the CPU does not support the SMM function).
The following procedure is required to support resume.
In other words, just before turning the power off, the BIOS notifies the V86EMS driver that the power is about to be turned off.
Upon receiving this notification, the V86EMS driver saves the virtual 86 mode-related state and turns virtual 86 mode OFF.
Also, just after turning the power on, the BIOS notifies the V86EMS driver that the power is ON. Upon receiving this notification,
the V86EMS driver restores the virtual 86 mode-related state and turns virtual 86 mode ON.
The power ON notification is made by INT 1Fh - Function 8B00h, and the power OFF notification is made by INT 1Fh - Function 8C00h.
o The PC-9801NS/T･NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne, etc. have CPUs that support the SMM function and have built-in suspend/resume functions, so this function is not issued.
u The PC-9801NL is equipped with V30HL, so it cannot use virtual 86 mode, but this function is issued.
Related INT 1Fh - Function 8B80h
INT 1Fh - Function 8C00h
INT 1Fh - Function 9A20h
0000:0400h bit 5,4
INT 1Fh - Function 8B80h
Classification RESUME BIOS
Name Resume post-processing
Undocumented
Target PC-9801NV, NS/E, NC, NL, NS/L, NA
Input AX=8B80h
Output None
Explanation o When the power is turned on under the following conditions, the BIOS issues this function after INT 1Fh - Function 8B00h
(PC-9801NV does not issue INT 1Fh - Function 8B00h, so only this function is called).
・Resume function is ON
・0000:0400h bit 4=1
o Device drivers that require special processing for resume can trap this function and perform the necessary processing after power is turned on.
The BIOS does not have a processing routine for this function. It is an interrupt that is defined for drivers to hook.
o The PC-9801NS/T･NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne, etc. have CPUs that support SMM function and have built-in suspend/resume functions, so this function is not issued.
Related INT 1Fh - Function 8B00h
INT 1Fh - Function 8C80h
INT 1Fh - Function 9A20h
0000:0400h bit 5,4
INT 1Fh - Function 8C00h
Classification RESUME BIOS
Name Suspend processing for EMM386
Target PC-9801NS/E･NC･NL･NS/L･NA
Input AX=8C00h
Output None
Explanation o If the power is turned off under the following conditions, the BIOS issues this function just before the power is turned off.
・Resume function is ON
・0000:0400h bit 4=1
o Used by the BIOS to notify the EMS driver using virtual 86 mode (hereafter abbreviated as V86EMS driver) that the power has been turned off.
EMM386.SYS (resume compatible version) and EMM386.EXE trap this function. When EMM386 is installed, executing this function turns off virtual 86 mode.
The BIOS does not have a processing routine for this function.
o When resuming with the V86EMS driver installed, if you turn the power off while in virtual 86 mode,
the virtual 86 mode-related state cannot be restored when the power is turned on again (if the CPU does not support the SMM function).
The following procedure is required to support resume.
In other words, just before turning the power off, the BIOS notifies the V86EMS driver that the power is about to be turned off.
Upon receiving this notification, the V86EMS driver saves the virtual 86 mode-related state and turns virtual 86 mode OFF.
Also, just after turning the power on, the BIOS notifies the V86EMS driver that the power is ON. Upon receiving this notification,
the V86EMS driver restores the virtual 86 mode-related state and turns virtual 86 mode ON.
The power ON notification is made by INT 1Fh - Function 8B00h, and the power OFF notification is made by INT 1Fh - Function 8C00h.
o The actual processing of turning the power off is performed by the NOTE system interrupt (INT 0Eh or INT 17h) handler.
This function is also called from the NOTE system interrupt.
o The PC-9801NS/T･NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne, etc. have CPUs that support the SMM function and have built-in suspend/resume functions, so this function is not issued.
u The PC-9801NL is equipped with a V30HL, so it cannot use virtual 86 mode, but this function is issued.
Related INT 1Fh - Function 8B00h
INT 1Fh - Function 8C80h
INT 1Fh - Function 98h
INT 1Fh - Function 9A20h
INT 0Eh (External interrupt...98NOTE)
INT 17h (External interrupt...98NOTE)
0000:0400h bit 5,4
INT 1Fh - Function 8C80h
Classification RESUME BIOS
Name Pre-suspend processing
Undocumented
Target PC-9801NV, NS/E, NC, NL, NS/L, NA
Input AX=8C80h
Output CF=End condition
1=Power OFF not possible
0=Power OFF possible
Explanation o If you try to turn off the power under the following conditions, the BIOS will issue this function before INT 1Fh - Function 8C00h
(for PC-9801NV, INT 1Fh - (Since 0000:0400h is not issued as Function 8C00h, only this function is called).
・Resume function is ON
・0000:0400h bit 4=1
o Device drivers that require special processing for resume can trap this function to perform the necessary processing before powering off.
The BIOS does not have a processing routine for this function. It is an interrupt that is defined for drivers to hook.
o The actual processing of powering off is performed by the NOTE system interrupt (INT 0Eh or INT 17h) handler. This function is also called from the NOTE system interrupt.
o If this function ends with CF=1, the BIOS considers that the pre-suspend processing has failed, and executes this function again with the next NOTE system interrupt.
This process is repeated until it ends with CF=0.
o For PC-9801NS/T･NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne, etc., the CPU supports the SMM function and has a built-in suspend/resume function, so this function is not issued.
Related INT 1Fh - Function 8B80h
INT 1Fh - Function 8C00h
INT 1Fh - Function 98h
INT 1Fh - Function 9A20h
INT 0Eh (External interrupt...98NOTE)
INT 17h (External interrupt...98NOTE)
0000:0400h bit 5,4
Figure Power ON/OFF when resume is ON
See the figure in the book
INT 1Fh - Function 8Bh
Classification RESUME BIOS
Name Resume processing
Undocumented
Target PC-98HA
Input AH=8Bh
Output None
Explanation o When the power is turned on, the BIOS issues this function.
o It appears that it can be used in combination with INT 1Fh - Function 8Ch to perform resume processing. Details unknown.
o There is no processing routine for this function in the BIOS. It is an interrupt that is defined for applications and drivers to hook.
Related INT 1Fh - Function 8Ch
INT 1Fh - Function 8Ch
Classification RESUME BIOS
Name Suspend processing
Undocumented
Target PC-98LT/HA
Input AH=8Ch
Output CF=End condition
1=Power OFF not possible
0=Power OFF possible
Explanation o When you try to turn off the power, the BIOS issues this function.
It is thought to be used by applications and drivers that do not want the power to be turned off at any time. Details unknown.
In PC-98HA, it can also be used in combination with INT 1Fh - Function 8Bh to perform resume processing.
o There is no processing routine for this function in the BIOS.
It is an interrupt defined for applications and drivers to hook.
Related INT 1Fh - Function 8Bh
INT 1Fh - Function 8Dh
Classification ???
Name Unknown
Undocumented
Target PC-98LT
Input AH=8Dh
Output CF=End condition
Explanation o Used in the INT 0Ah handler of PC-98LT. It does not appear to be used in PC-98HA.
o There is no processing routine for this function in the BIOS.
It is an interrupt defined for applications and drivers to hook.
Related
■PC-98HA Alarm BIOS
INT 1Fh - Function 8Eh
Classification ALARM BIOS
Name Alarm notification
Target PC-98HA
Input AH=8Eh
Output CF=End condition
0: Do not process alarm
1: Process alarm
Explanation o Issued by BIOS when it matches the alarm time set in INT 1Ch - Function 07h.
o CF notifies BIOS whether to process alarm.
If you return with CF=1, BIOS will issue INT 1Fh - Function 8Fh every 100ms. If you return with CF=0, INT 1Fh - Function 8Fh will not be issued.
o If you want to sound the buzzer when the set time is reached, hook this function to INT 1Fh - Function 8Fh.
Turn the buzzer on and off within the processing routine of INT 1Fh - Function 8Fh.
When the alarm time arrives, the BIOS simply issues INT 1Fh - Function 8Eh, 8Fh, and does not perform any processing such as sounding the buzzer.
o There is no processing routine for this function in the BIOS.
This is an interrupt defined for applications and drivers to hook.
Related INT 1Ch - Function 07h
INT 1Fh - Function 8Fh
INT 1Fh - Function 8Fh
Classification ALARM BIOS
Name Alarm sounding timer
Target PC-98HA
Input AH=8Fh
Output CF=End condition
1: Stop alarm processing
0: Continue alarm processing
Explanation o When INT 1Fh - Function 8Eh is returned with CF=1, the BIOS issues this every 100ms.
o CF notifies the BIOS whether to continue alarm processing.
When CF=0 is returned, this function is continuously issued every 100ms. Returning with CF=1 stops issuing this function.
o There is no processing routine for this function in the BIOS.
This is an interrupt defined for applications and drivers to hook.
Related INT 1Ch - Function 07h, 08h, 09h
INT 1Fh - Function 8Eh
■Protected memory BIOS
INT 1Fh - Function 90h
Classification Protected memory BIOS
Name Memory transfer to and from protected memory
Undocumented
Target Machines with 80286 or higher CPU
Input AH=90h
ES:BX=Segment descriptor pointer
SI=Source address offset (segment is specified by DS selector)
DI=Destination address offset (segment is specified by ES selector)
CX=Number of bytes transferred (64KB when 0)
<Segment descriptor structure>
-------------+--------------------------
Address | Contents
-------------+--------------------------
ES:BX+00-0Fh | Reserved (no user setting required)
ES:BX+10-17h | For DS (user setting required)
ES:BX+18-1Fh | For ES (user setting required)
ES:BX+20-27h | For CS (no user setting required)
ES:BX+28-2Fh | For SS (no user setting required)
-------------+--------------------------
Output CF=End condition
1: Error (CPU is in V30 or V30 equivalent mode)
0: Normal end
Explanation o Performs memory transfer with protected memory.
Related 0000:0401h
INT 1Fh - Function 91h
INT 1Fh - Function 91h
Classification Protected memory BIOS
Name Program execution on protected memory
Undocumented
Target Machines with 80286 or higher CPU
Input AH=91h
ES:BX=Segment descriptor pointer
DH=ICW2 (first interrupt number) when initializing master PIC
DL=ICW2 (first interrupt number) when initializing slave PIC
<Segment descriptor structure>
-------------+--------------------------
Address | Contents
-------------+--------------------------
ES:BX+00-07h | Reserved (user setting not required)
ES:BX+08-0Fh | GDT (user setting required)
ES:BX+10-17h | IDT (user setting required)
ES:BX+18~1Fh | For DS (user can set as desired)
ES:BX+20~27h | For ES (user can set as desired)
ES:BX+28~2Fh | For SS (user must set)
ES:BX+30~37h | For CS (user must set)
-------------+--------------------------
Output CF=End condition
1: Error (CPU is in V30 or V30 equivalent mode)
0: Normal end
Explanation o Shifts execution to the program in the protected memory.
o The following preparations are required before executing the function.
- Set SHUT 0 = 0 (OUT 37h,0Eh)
- Push the return address segment (PUSH CS)
- Push the return address offset (PUSH offset address)
- Save the SP value at 0000:0404h
- Save the SS value at 0000:0406h
o The user program ends with IRET.
Related INT 1Fh - Function 90h
0000:0404h
I/O 0037h
INT 1Fh - Function 92h
Classification ??? BIOS
Name Unknown
Undocumented
Target PC-9801P
Input AH=92h
AL=00h,01h
Output None
Explanation o Unknown. Operates I/O 998Eh bit 1.
When AL=00h, set I/O 998Eh bit 1=0
When AL=01h, set I/O 998Eh bit 1=1
u In the part of the BIOS that judges AH=92h, the logic of the conditional branch command after the compare (cmp ah,92h) is reversed from the original.
Therefore, even if INT 1Fh is executed with AH=92h, the original processing routine of this function is not executed.
Conversely, when INT 1Fh is executed with AH=93-95h, 99h, 9B-9Dh, 9Fh, etc., which do not originally have a processing routine,
the original processing routine of this function is executed.
Related I/O 998Eh bit 1
■Display Suspend BIOS
INT 1Fh - Function 93h
Classification Display Suspend BIOS
Name Display low power consumption mode control
Undocumented
Target PC-9801BA2･BS2･BX2, PC-9821Ap2･As2･Bf･Bp･Bs･Be･Ts･Cs2･Ce2
Input AH=93h
AL=mode
00h: Switch to suspend mode (display OFF)
01h: Switch to ON mode (display ON)
Output None
Explanation o Sets the low power consumption mode of a DPMS (Display Power Management System) compatible display.
o When executed with AL=00h, the R, G, B, and VSYNC signals among the video output signals will stop.
If a DPMS-compatible display is connected, the display will enter suspend mode.
There is no function to enter standby mode (where the R, G, B, and HSYNC signals stop) as specified by DPMS.
o On the PC-9821Ts, the LCD backlight turns off in suspend mode.
o The PC-9801NS/A/NL/R do not support this function.
u If this function is executed two or more times in succession with AL=00h, the CRT-related hardware status saved at 0000:05B4h,
05B5h will be destroyed, and the display status cannot be restored to normal with AL=01h.
Related 0000:05B4h
0000:05B5h
I/O 09A2h
INT 1Fh - Function 9A07h
■ROM drive BIOS
INT 1Fh - Function 94h
Classification ROM drive BIOS
Name Reading from ROM drive
Undocumented
Target PC-98LT/HA, PC-9801NL
Input AH=94h
CX=Transfer data length (unit: 16 bytes)
DX=Transfer start address in ROM drive (unit: 16 bytes)
ES:BX=Transfer address
Output CF=0
Explanation o Reads the contents of the built-in ROM drive into a buffer.
o The ROM drive stores the MS-DOS system, and can be booted from the ROM drive. When booting from the ROM drive, the drive name of the ROM drive becomes C:.
Related INT 1Fh - Function 95h
Reference TheBASIC'92/6-p.109 (c)enjo
INT 1Fh - Function 95h
Classification ROM drive BIOS
Name Writing to ROM drive
Undocumented
Target PC-98LT/HA, PC-9801NL
Input AH=95h
CX=Transfer data length (unit: 16 bytes)
DX=Transfer start address in ROM drive (unit: 16 bytes)
ES:BX=Transfer address
Output CF=End condition
1: Unable to write (insufficient area or write protect ON)
0: Normal end
Explanation o Patches the built-in ROM drive.
o Models with ROM drives have built-in battery-backed SRAM. This SRAM can be used to patch the contents of the ROM drive.
o If there is insufficient area for patching in the SRAM, it returns with CF=1.
o For PC-98LT/HA, I/O 0035h bit 5 is the write protect bit. When this value is 0, writing is prohibited.
o For PC-9801NL, the write protect state can be controlled by INT 1Fh - Function 9Dh Subfunction 00h,01h.
Related INT 1Fh - Function 94h
INT 1Fh - Function 9Dh Subfunction 00h,01h
INT 1Fh - Function 9Dh Subfunction 02h
0000:045Ch bit 3[PC-9801NL]
I/O 0035h bit 5[PC-98LT/HA]
Reference TheBASIC'92/6-p.109 (c)enjo
■98NOTE related BIOS
INT 1Fh - Function 96h
Classification ??? BIOS
Name Get internal modem setting status
Undocumented
Target 98NOTE, PC-9801US, PC-98HA
Input AH=96h
Output DX=Internal modem setting status
bit 15=Modem power
1=ON
0=OFF
bit 14=Parity (Don't care when setting with INT 1Fh - Function 97h)
bit 13=Loss of carrier disconnect
1=No
0=Yes
bit 12=CI option selection
1=No
0=Yes
bit 11=CD option selection
1=No
0=Yes
bit 10=Answer tone confirmation
1=No
0=Yes
bit 9=Answer tone transmission
1=No
0=Yes
bit 8=Automatic answering
1=No
0=Yes
bit 7=Buzzer off
1=No
0=Yes
bit 6,5=Dial mode
11b=20pps
10b=10pps
00b=Tone
bit 4=Loopback test
1=No
0=Yes
bit 3,2=Communication speed [2400bps/300bps/1200bps/AUTO=00/01/10/11]
11b=AUTO
10b=1200bps
01b=300bps
00b=2400bps
bit 1,0=Modem mode
10b=CALL
01b=ANS
00b=AUTO
Description o Reads the current setting status of the built-in modem.
u PC-9801NL/NS/L/P/NS/A/NL/R/US, PC-9821Ne do not have a dedicated modem slot, but the process remains.
Related INT 1Fh - Function 97h
Memory SW 14h [PC-98HA]
Memory SW 15h [PC-98HA]
INT 1Fh - Function 97h
Classification ??? BIOS
Name Built-in modem settings
Undocumented
Target 98NOTE, PC-9801US, PC-98HA
Input AH=97h
DX=Modem setting value
* See INT 1Fh - Function 96h for the setting value
Output None
Description o Sets the status of the built-in modem.
The setting of this function is also reflected in the 98NOTE menu.
u PC-9801NL/NS/L/P/NS/A/NL/R/US and PC-9821Ne do not have a dedicated modem slot, but the process remains.
Related INT 1Fh - Function 96h
Memory SW 14h [PC-98HA]
Memory SW 15h [PC-98HA]
■Power BIOS
INT 1Fh - Function 98h
Classification Power BIOS
Name Power OFF
Undocumented
Target PC-98LT/HA, PC-9801LV/UV11/CV, 98NOTE, PC-H98
Input AH=98h
Output None
Explanation o Turns the power OFF.
o On models that can resume, the system interrupt handler performs the actual power OFF process.
For this reason, the execution of this function and the actual power OFF are asynchronous.
The CPU continues to execute the instruction following INT 1Fh that called this function until the power is turned OFF.
o When the power is turned ON with resume ON, the address where the user program resumes execution is the
position to return from the system interrupt that actually turned the power OFF.
u On the PC-9801N, executing this function will cause the system to go out of control.
The PC-9801NS has a processing routine, but the I/O operation being executed there does not turn the power OFF.
The PC-9801UV11/CV has the same ROM as the PC-9801LV, so there is a processing routine for this function, but the power cannot be turned off.
Related INT 0Ah (External interrupt...LT/HA)
INT 0Eh (External interrupt...98NOTE)
INT 17h (External interrupt...98NOTE)
INT 1Fh - Function 8Ch
INT 1Fh - Function 8C00h
INT 1Fh - Function 8C80h
INT 1Fh - Function 9Eh Subfunction 00h,01h
INT 1Fh - Function DFh
■PC-98HA related BIOS
INT 1Fh - Function 99h
Classification ??? BIOS
Name Unknown
Undocumented
Target PC-98HA
Input AH=99h
Output CF
Explanation o Unknown
Related
■98NOTE Advanced Power Management BIOS
INT 1Fh - Function 9A00h
Classification Advanced Power Management BIOS
Name Installation Check
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A00h
Output CF=0 (normal end)
AH=major version (BCD)
AL=minor version (BCD)
BX=504Dh('PM')
CX=function flag
bit 7-4 = reserved
bit 3 = power management
1: disabled
0: enabled (always 0 on PC-9800)
bit 2 = CPU idle
1: low speed (low power consumption)
0: highest speed (always 0 on PC-9800)
bit 1 = support for 32-bit protected mode interface
1: enabled
0: disabled
bit 0 = support for 16-bit protected mode interface
1: Yes
0: No
----------------+-----+-----+-------+
Model name | AH | AL | CX |
----------------+-----+-----+-------+
PC-9801NS/R | 01h | 00h | 0003h |
PC-9801P | 01h | 01h | 0003h |
PC-9801NX/C･NL/R| 01h | 02h | 0003h |
PC-9821Ne | 01h | 03h | 0003h |
PC-9801NS/A | 01h | 03h | 0003h |
----------------+-----+-----+-------+
Explanation o Checks for the presence of APM-BIOS.
o Equivalent to INT 15h - Function 5300h on IBM-PC/AT compatible machines.
Related
INT 1Fh - Function 9A01h
Classification Advanced Power Management BIOS
Name Interface Connect
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A01h
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
02h: Already declared to be in use
Explanation o Declares the start of use of the APM BIOS (for real mode).
o Equivalent to INT 15h - Function 5301h on IBM-PC/AT compatible machines.
Related INT 1Fh - Function 9A04h
INT 1Fh - Function 9A02h
Classification Advanced Power Management BIOS
Name Protected Mode 16-bit Interface Connect
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A02h
Output ■When CF=0 (normal end)
AX=Segment address of 16-bit protected mode code segment in real mode
BX=Entry address offset
CX=Segment address of 16-bit protected mode data segment in real mode
■When CF=1 (error)
AH=Return code
05h: Already declared to be in use
06h: Not supported
Explanation o Declares the start of use of APM-BIOS (for virtual 86 mode).
o Corresponds to INT 15h - Function 5302h on IBM-PC/AT compatible machines.
Related INT 1Fh - Function 9A04h
INT 1Fh - Function 9A03h
Classification Advanced Power Management BIOS
Name Protected Mode 32-bit Interface Connect
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A03h
Output ■When CF=0 (normal end)
AX=Segment address of 32-bit protected mode code segment in real mode
EBX=Entry address offset
CX=Segment address of 16-bit protected mode code segment in real mode
DX=Segment address of 16-bit protected mode data segment in real mode
■When CF=1 (error)
AH=Return code
07h: Already declared to be in use
08h: Not supported
Explanation o Declares the start of use of APM-BIOS (for protected mode).
o IBM-PC/AT compatible machines INT 15h - Function 5303h equivalent.
Related INT 1Fh - Function 9A04h
INT 1Fh - Function 9A04h
Classification Advanced Power Management BIOS
Name Interface Disconnect
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A04h
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o Declares the end of use of APM-BIOS.
o Equivalent to INT 15h - Function 5304h on IBM-PC/AT compatible machines.
Related INT 1Fh - Function 9A01h
INT 1Fh - Function 9A02h
INT 1Fh - Function 9A03h
INT 1Fh - Function 9A05h
Category Advanced Power Management BIOS
Name CPU Idle
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A05h
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o Sets the CPU to a low-speed (low-power consumption) state.
o Equivalent to INT 15h - Function 5305h on IBM-PC/AT compatible machines.
Related INT 1Fh - Function 9A06h
INT 1Fh - Function 9A06h
Classification Advanced Power Management BIOS
Name CPU Busy
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A06h
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o Sets the CPU to maximum speed.
o Equivalent to INT 15h - Function 5306h on IBM-PC/AT compatible machines.
Related INT 1Fh - Function 9A05h
INT 1Fh - Function 9A07h
Classification Advanced Power Management BIOS
Name Set Power State
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A07h
BH=Device ID
00h: Entire system
01h: Display (backlight)
02h: Floppy disk
03h: Hard disk
04h: Printer
05-FFh: Reserved
CX=System State ID
0000h: Ready
0001h: Standby
0002h: Suspend
0003h: Off
---------+-------------------------+---------------+---------------+---------------+---------------+
System | Device ID | Device ID | Device ID | Device ID | Device ID |
State ID | 00h | 01h | 02h | 03h | 04h |
---------+-------------------------+---------------+---------------+---------------+---------------+
0000h | Backlight ON | Backlight ON | Not working | Not working | Not working |
---------+-------------------------+---------------+---------------+---------------+---------------+
0001h | Backlight-FDD-HDD | Backlight OFF | FDD motor OFF | HDD motor OFF | Printer port |
| Motor OFF, printer port | | | | Output FFh to |
| Output FFh to | | | | |
---------+-------------------------+---------------+---------------+---------------+---------------+
0002h | Turn resume ON and power off |
---------+-------------------------+---------------+---------------+---------------+---------------+
0003h | Immediate power off |
---------+-------------------------+---------------+---------------+---------------+---------------+
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared in use
09h: BH register value is out of range
0Ah: CX register value is out of range
60h: Power off is prohibited
Explanation o Power control is performed for each device.
The device ID specifies the device to be power controlled. If 00h is specified, all devices with device IDs 01 to 04h will be targeted.
The system state ID specifies the level of power control.
o Equivalent to INT 15h - Function 5307h on IBM-PC/AT compatible machines
(The settings are different).
Related INT 1Fh - Function 93h
INT 1Bh - Function F0h(IDE HD)
INT 1Bh - Function 83h(FD)
INT 1Fh - Function 9A08h
Classification Advanced Power Management BIOS
Name Enable/Disable Power Management Functionality
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A08h
CX=Automatic power saving function
0000h=Disabled
0001h=Enabled
Output ■CF=0 (Normal end)
■When CF=1 (Error)
AH=Return code
01h: CX register value is out of range
03h: APM BIOS is not declared to be in use
Explanation o If the automatic power saving function is disabled, the system will not automatically switch to power saving mode.
In this case, it is possible to force the system to switch to power saving mode by executing INT 1Fh - Function 9A05h.
o Equivalent to INT 15h - Function 5308h on IBM-PC/AT compatible machines.
Related
INT 1Fh - Function 9A09h
Classification Advanced Power Management BIOS
Name Restore SYSTEM-BIOS Power On Defaults
Undocumented
Target PC-9801P/NX/C/NS/A/NL/R, PC-9821Ne
Input AX=9A09h
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o Initialize the BIOS in the same way as when the power is turned on.
Executes the initialization function for printer BIOS, floppy disk BIOS, hard disk BIOS, Pen BIOS, and CRT BIOS.
o Equivalent to INT 15h - Function 5309h for IBM-PC/AT compatible machines.
Related
INT 1Fh - Function 9A0Ah
Classification Advanced Power Management BIOS
Name Get Power Status
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A0Ah
Output ■When CF=0 (normal end)
BL=AC adapter connection status
00h: Not connected
01h: Connected
CL=Battery pack remaining capacity
bit 7-5: Unused
bit 4-0: Battery status
CH=Second battery pack remaining capacity
bit 7-5: Unused
bit 4-0: Battery status
<Meaning of battery status>
---------------------+------------------------------------------------------------
Value | Meaning (The notation in <> is the expression in the battery remaining capacity display field in the 98NOTE menu)
---------------------+------------------------------------------------------------
x1xxxb | <Unconfirmed>
00000b | Battery remaining capacity [0/8]
00001b | Remaining battery capacity [1/8]
00010b | Remaining battery capacity [2/8]
00011b | Remaining battery capacity [3/8]
00100b | Remaining battery capacity [4/8]
00101b | Remaining battery capacity [5/8]
00110b | Remaining battery capacity [6/8]
00111b | Remaining battery capacity [7/8]
10111b | Remaining battery capacity [8/8] (fully charged)
10001b | Remaining battery capacity [0/8] (there are two ways to express 0/8)
10000b | <Not connected>
10010b | <Initial charge> or <Deep discharge>
10100b | <Abnormal>
Other than the above | <Invalid>
---------------------+------------------------------------------------------------
■When CF=1 (Error)
AH = Return code
01h: Failed to get battery status
03h: APM BIOS not declared active
Explanation o Gets the power status.
o PC-9801NL/R cannot get the remaining battery pack capacity, so always returns 4/8 remaining capacity.
PC-9801P･NL/R cannot use a second battery pack, so always returns <not connected>.
o Equivalent to INT 15h - Function 530Ah on IBM-PC/AT compatible machines (the information that can be obtained differs).
Related I/O 8810h
INT 1Fh - Function 9A0Bh
Classification Advanced Power Management BIOS
Name Get PM Event
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A0Bh
Output ■When CF=0 (normal end)
CL=Event status
bit 2: Note menu (pen menu) request
0=None
1=Yes
bit 1: Power off request
0=None
1=Yes
bit 0: Unknown
■When CF=1 (error)
AH=Return code
03h: APM BIOS is not declared to be in use
Explanation o Gets whether there is a pending event.
o Equivalent to INT 15h - Function 530Bh for IBM-PC/AT compatible machines (event status content is different).
Related
INT 1Fh - Function 9A0Ch
Classification Advanced Power Management BIOS
Name Unknown
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A0Ch
Output ■When CF=0 (normal end)
BL=unknown
bit 7-3: Unused (always 0)
bit 2-0: Unknown
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation Reads the setting value of INT 1Fh - Function 9A0Dh. Details unknown.
Related INT 1Fh - Function 9A0Dh
INT 1Fh - Function 9A0Dh
Classification Advanced Power Management BIOS
Name Unknown
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A0Dh
BL=Unknown
bit 7-3: Unused (always 0)
bit 2-0: Unknown
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation
Related INT 1Fh - Function 9A0Ch
INT 1Fh - Function 9A0Eh
Classification Advanced Power Management BIOS
Name Get power save operation start time
Undocumented
Target PC-9801NS/R･P･NL/R
Input AX=9A0Eh
Output ■When CF=0 (normal end)
BL=time (0-60 seconds)
*When 0, do not use auto power save
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o Gets the time until automatically entering power save mode.
Related INT 1Fh - Function 9A0Fh
INT 1Fh - Function 9A0Fh
Classification Advanced Power Management BIOS
Name Power save operation start time setting
Undocumented
Target PC-9801NS/R･P･NL/R
Input AX=9A0Fh
BL=time (0-60 seconds)
* When 0, do not use auto power save
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
04h: BL register value is out of range
Explanation o Sets the time until automatically entering power save mode.
If the value set in the BL register is not 1, 2, 3, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, or 60, it is set to the closest value below the BL register.
o Equivalent to the power save mode setting in the 98NOTE menu.
Related INT 1Fh - Function 9A0Eh
INT 1Fh - Function 9A10h
Category Advanced Power Management BIOS
Name Get auto power off time
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A10h
Output ■When CF=0 (normal end)
BL=time (0-60 minutes)
*When 0, auto power off is not used
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation Gets the time until auto power off.
Related INT 1Fh - Function 9A11h
INT 1Fh - Function 9A11h
Category Advanced Power Management BIOS
Name Auto power off time setting
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A11h
BL=time (0-60 minutes)
* When 0, auto power off is not used
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
04h: BL register value is out of range or resume is not set
Explanation o Sets the time until auto power off.
If the value set in the BL register is not 1, 2, 3, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, or 60, it will be set to the closest value below the BL register.
o Equivalent to the Auto Power Off setting in the 98NOTE menu.
Related INT 1Fh - Function 9A10h
INT 1Fh - Function 9A12h
Classification Advanced Power Management BIOS
Name Gets the status of the timer calendar clock LSI
Undocumented
Target PC-9801P
Input AX=9A12h
Output ■When CF=0 (normal end)
AH=0Bh (unknown)
BL=Timer usage status
00h: Timer calendar clock IC cannot be used
02h: Timer calendar clock IC can be used
■When CF=1 (error)
AH=Return code
03h: APM BIOS has not been declared to be in use
Explanation o Reads the contents set in INT 1Fh - Function 9A13h.
00h is returned to BL at startup. Details unknown.
Related INT 1Fh - Function 9A13h
I/O 8E1Eh bit 4
INT 1Fh - Function 9A13h
Classification Advanced Power Management BIOS
Name Enable/disable use of calendar clock LSI for timers
Undocumented
Target PC-9801P
Input AX=9A13h
BL=Timer enable status
00h: Disable use
02h: Enable use
Output ■When CF=0 (normal end)
AH=0Bh (unknown)
■When CF=1 (error)
AH=Return code
03h: APM BIOS has not been declared enabled
Explanation o Details unknown.
When BL bit 1=1, set I/O 8E1Eh bit 4=1.
When BL bit 1=0, set I/O 8E1Eh bit 4=0.
Related INT 1Fh - Function 9A12h
I/O 8E1Eh bit 4
INT 1Fh - Function 9A14h
Classification Advanced Power Management BIOS
Name Get timer setting time from timer calendar clock LSI
Undocumented
Target PC-9801P
Input AX=9A14h
Output ■When CF=0 (normal end)
BH=month
BL=day
CH=hour
CL=minute
DH=second
DL=
bit 7-3: Always 00000b
bit 2: Unknown
1=When I/O 5E8Eh bit 7=1
0=When I/O 5E8Eh bit 7=0
bit 1: Unknown
1=When I/O 8B1Eh bit 6=0
0=When I/O 8B1Eh bit 6=1
bit 0: Always 0
■When CF=1 (error)
AH=Return code
03h: APM BIOS is not declared in use
Explanation o INT 1Fh - Gets the time set by Function 9A15h.
Details unknown.
Related INT 1Fh - Function 9A15h
0000:045Dh bit7
I/O 5E8Eh bit7
I/O 8E1Eh
INT 1Fh - Function 9A15h
Category Advanced Power Management BIOS
Name Set timer time to timer calendar clock LSI, start timer
Undocumented
Target PC-9801P
Input AX=9A15h
BH=month
BL=day
CH=hour
CL=minute
DH=second
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
04h: BH register value is out of range
Explanation o Details unknown.
Related INT 1Fh - Function 9A14h
INT 1Fh - Function 9A16h
0000:045Dh
I/O 5E8Eh bit 7
I/O 8B1Eh bit 6
INT 1Fh - Function 9A16h
Classification Advanced Power Management BIOS
Name Stop timer
Undocumented
Target PC-9801P
Input AX=9A16h
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o Stops the timer started with INT 1Fh - Function 9A15h.
Details unknown.
Related INT 1Fh - Function 9A15h
I/O 8B1Eh bit 6
INT 1Fh - Function 9A17h,9A18h
Classification Advanced Power Management BIOS
Name No function
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A17h,9A18h
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o
Related
INT 1Fh - Function 9A19h
Classification Advanced Power Management BIOS
Name Unknown
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A19h
Output ■When CF=0 (normal end)
CL=
77h: PC-9801NS/R
A7h: PC-9801NX/C, PC-9821Ne, PC-9801NS/A
B7h: PC-9801P･NL/R
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o
Related
INT 1Fh - Function 9A1Ah
Classification Advanced Power Management BIOS
Name Unknown
Undocumented
Target PC-9801P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A1Ah
Output ■When CF=0 (normal end)
CL=?
bit 7: Battery warning buzzer when low battery
0= Battery warning buzzer sounds
1= Battery warning buzzer does not sound
bit 6: Unknown
bit 5: Unknown
bit 4: Unknown
bit 3-1: Unknown
bit 0: Standby mode settings (details unknown)
■When CF=1 (error)
AH=Return code
03h: APM BIOS has not been declared in use
Explanation o INT 1Fh - Gets the settings set by Function 9A1Bh. Details unknown.
Related INT 1Fh - Function 9A1Bh
INT 1Fh - Function 9A1Bh
Classification Advanced Power Management BIOS
Name Unknown
Undocumented
Target PC-9801P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A1Bh
CL=Unknown
bit 7: Battery warning buzzer when low battery
0= Battery warning buzzer sounds
1= Battery warning buzzer does not sound
bit 6:Unknown
bit 5:Unknown
bit 4:Unknown
bit 3〜1:Unknown
bit 0: Standby mode related settings (details unknown)
Output ■CF=0 (normal end)
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o
Related INT 1Fh - Function 9A1Ah
INT 1Fh - Function 9A1Ch
Classification Advanced Power Management BIOS
Name Unknown
Undocumented
Target PC-9801P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A1Ch
BX=Unknown
Output ■CF=0 (normal end)
■CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o
Related
INT 1Fh - Function 9A1Dh
Classification Advanced Power Management BIOS
Name Open 98NOTE menu
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A1Dh
Output ■CF=0 (normal end)
■CF=1 (error)
AH=return code
03h: APM BIOS is not declared to be in use
Explanation o Open 98NOTE menu (98 pen menu)
Related 0000:059Eh bit3
INT 1Fh - Function 9A1Eh
Classification Advanced Power Management BIOS
Name Unknown
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A1Eh
Output ■When CF=0 (normal end)
BX=system status
bit 15-8: 0 (reserved)
bit 7: printer strobe
bit 6: related to the last command sent to GDC
bit 5: calendar clock LSI generating timer interrupt
bit 4: interrupt request to PIC
bit 3: 0 (reserved)
bit 2: PIC related
bit 1: power off prohibited
bit 0: no power off request, no 98NOTE menu request
■When CF=1 (error)
AH=return code
03h: APM BIOS is not declared active
Explanation o
Related 0000:0456h
0000:059Eh
I/O 5E8Eh bit7
INT 1Fh - Function 9A1Fh
Classification Advanced Power Management BIOS
Name No function
Undocumented
Target PC-9801NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A1Fh
Output CF=1 (error)
AH=01h: Invalid function
Explanation o
Related
INT 1Fh - Function 9A20h
Classification Advanced Power Management BIOS
Name Registration of suspend/resume processing routine
Undocumented
Target PC-9801P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A20h
BX:DX=Entry address of suspend/resume processing routine
Output ■When CF=0 (normal end)
BX:DX=Old setting address (unused when 0000:0000h)
CX=Registration nesting level
■When CF=1 (error)
AH=Return code
03h: APM BIOS is not declared to be in use
Explanation o Register the entry address of the processing routine to be executed when suspending/resume.
The processing routine is FAR CALLed at AX=0000h when suspending and at AX=0001h when resuming. After its own processing is completed,
it is necessary to jump to the old setting address returned by this function. At that time, save AX. However, if the old setting address is 0000:0000h, it will end with RETF.
Related INT 1Fh - Function 9A21h
INT 1Fh - Function 8B00h
INT 1Fh - Function 8C00h
INT 1Fh - Function 9A21h
Category Advanced Power Management BIOS
Name Delete suspend/resume processing routine
Undocumented
Target PC-9801P/NX/C/NS/A/NL/R, PC-9821Ne
Input AX=9A21h
CX=Registered nesting level
BX:DX=Old setting address
Output ■When CF=0 (normal end)
AH=00h
■When CF=1 (error)
AH=Return code
03h: APM BIOS is not declared to be in use
0Ah: Registered nesting level is invalid
Explanation o Delete the suspend/resume processing routine registered with INT 1Fh - Function 9A20h. The registered nesting level and old setting
address use the values returned when registered with INT 1Fh - Function 9A20h.
Related INT 1Fh - Function 9A20h
INT 1Fh - Function 8B00h
INT 1Fh - Function 8C00h
INT 1Fh - Function 9A22h,9A23h
Classification Advanced Power Management BIOS
Name No function
Undocumented
Target PC-9801P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A22h,9A23h
Output CF=1(Abnormal termination)
AH=01h: Invalid function
Explanation o
Related
INT 1Fh - Function 9A24h
Classification Advanced Power Management BIOS
Name Unknown
Undocumented
Target PC-9801P･NX/C･NS/A･NL/R, PC-9821Ne
Input AX=9A24h
BX:DX=Setting address
Output ■When CF=0 (normal end)
BX:DX=old setting address (unused when 0000:0000)
CX=registered nesting level
■When CF=1 (error)
AH=return code
03h: APM BIOS has not been declared in use
Explanation o Sets the address of a user routine to be started by an interrupt that occurs due to some event. Details such as the timing at which it is called are unknown.
Related INT 1Fh - Function 9A25h
INT 1Fh - Function 9A25h
Classification Advanced Power Management BIOS
Name Unknown
Undocumented
Target PC-9801P/NX/C/NS/A/NL/R, PC-9821Ne
Input AX=9A25h
CX=Registered nesting level
BX:DX=Old setting address
Output ■When CF=0 (normal end)
AH=00h
■When CF=1 (error)
AH=Return code
03h: APM BIOS is not declared to be in use
0Ah: Registered nesting level is invalid
Explanation o Delete the address registered with INT 1Fh - Function 9A24h.
For the registered nesting level and old setting address, use the value returned when registered with INT 1Fh - Function 9A24h.
Related INT 1Fh - Function 9A24h
■Pen BIOS
INT 1Fh - Function 9B00h
Category BIOS
Name Pen BIOS Initialization
Undocumented
Target PC-9801P
Input AX=9B00h
Output CF=0 (Normal end)
Explanation o Initialize the Pen BIOS.
Initialization is completed when the system starts.
Related
INT 1Fh - Function 9B01h, 9B02h, 9B03h
Category Pen BIOS
Name No function
Undocumented
Target PC-9801P
Input AX=9B01h, 9B02h, 9B03h
Output CF=0 (Normal end)
Explanation o Returns with CF=0 without doing anything.
Related
INT 1Fh - Function 9B04h
Category Pen BIOS
Name Tablet interrupt cycle setting
Undocumented
Target PC-9801P
Input AX=9B04h
BL=bit 7-3: Unused
bit 2-0: Tablet interrupt cycle
0= 5Hz
1= 10Hz
2= 20Hz
3= 40Hz
4= 80Hz
5=100Hz (default)
6=200Hz
7=Cannot be specified
Output CF=End status
0=Normal end
1=Abnormal end (when BL bit 2-0=7h)
Explanation o Sets the INT 0Eh interrupt cycle when the tablet detects the pen.
Related INT 1Fh - Function 9B07h
INT 0Eh (External interrupt...98Pen)
INT 1Fh - Function 9B05h
Category Pen BIOS
Name Unknown
Undocumented
Target PC-9801P
Input AX=9B05h
BL=bit 7-3: Unused
bit 2-0: Command selection for tablet
Output CF=0 (normal end)
Explanation o Sends a command to the tablet according to the BL value. Details unknown.
Related INT 1Fh - Function 9B07h
INT 1Fh - Function 9B06h
Category Pen BIOS
Name Unknown
Undocumented
Target PC-9801P
Input AX=9B06h
BL=Command selection for tablet
* When BL bit 1,0=11b or BL bit 7=0, CX,DX are not arguments
CX=Tablet command (X coordinate specification)
DX=Tablet command (Y coordinate specification)
Output CF=0 (normal end)
Explanation o Sends a command to the tablet according to the BL value. Details unknown.
o If a value other than BL=80h is set, INT 1Fh - Function 9B08h will always abort.
Related INT 1Fh - Function 9B07h
INT 1Fh - Function 9B07h
Category Pen BIOS
Name Get PenBIOS mode setting status
Undocumented
Target PC-9801P
Input AX=9B07h
Output CF=0 (normal end)
AL=BL value set in INT 1Fh - Function 9B06h
BL=
bit 7: Mouse emulation mode
1=indirect
0=direct
bit 6-4: Tablet interrupt cycle
0= 5Hz
1= 10Hz
2= 20Hz
3= 40Hz
4= 80Hz
5=100Hz (default)
6=200Hz
bit 3-1:BL value set in INT 1Fh - Function 9B05h
000b=default
bit 0:Mouse emulation
1=enabled
0=disabled
CX=CX value set by INT 1Fh - Function 9B06h
DX=DX value set by INT 1Fh - Function 9B06h
Explanation Obtains the mode setting status of the o Pen BIOS.
Related INT 1Fh - Function 9B06h
INT 1Fh - Function 9B08h
INT 1Fh - Function 9B09h
INT 1Fh - Function 9B08h
Classification Pen BIOS
Name Mouse emulation mode setting
Undocumented
Target PC-9801P
Input AX=9B08h
BX=Mouse emulation mode
0000h=Direct mode
not 0=Indirect mode
Output CF=End state
0=Normal end
1=Abnormal end
Explanation o The mouse emulation settings in the 98 Pen menu also change, so the setting state remains valid
even after resetting or turning off the power.
o When a value other than BL=80h is set in INT 1Fh - Function 9B06h, this function ends abnormally.
o In mouse emulation, the total pen count in the X-axis direction is 640, and the total pen count in the
Y-axis direction is 400 (the total count is the number of counts that can be read from the mouse I/F
when the pen is moved from the left edge to the right edge and from the top edge to the bottom edge of the screen).
o In direct mouse emulation mode, button operations are performed as follows.
Left button click: Touch the tip of the pen to the screen once and release it
Double click the left button: Touch the tip of the pen to the screen twice and release it
Left button drag: Move while keeping the tip of the pen touching the screen
Right button click: With the side switch pressed, touch the tip of the pen to the screen once and release it
Double click the right button: With the side switch pressed, touch the tip of the pen to the screen twice and release it
Right button drag: With the side switch pressed, move while keeping the tip of the pen touching the screen
o In indirect mouse emulation mode, button operations are performed as follows.
Left button click (1): With the tip of the pen touching the screen, press the side switch once,
lift the tip, then touch the tip of the pen to the screen once again and release it.
Left button click (2): With the tip of the pen touching the screen, press the side switch once and release it.
Left button double click: With the tip of the pen touching the screen, press the side switch once,
lift the tip, then touch the tip of the pen to the screen twice again and release it.
Left button drag (1): With the tip of the pen touching the screen, press the side switch once,
lift the tip, then move the pen while keeping the tip of the pen touching the screen again.
Left button drag (2): With the tip of the pen touching the screen, press the side switch once and move the pen.
Right button click (1): With the tip of the pen touching the screen, quickly press the side switch twice,
lift the tip, then touch the tip of the pen to the screen once again and release it.
Right button click (2) : With the tip of the pen touching the screen, quickly press the side switch twice and release it.
Double-click the right button: With the tip of the pen touching the screen, quickly press the side switch twice,
lift the tip, then touch the tip of the pen to the screen twice again and release it.
Drag the right button (1): With the tip of the pen touching the screen, quickly press the side switch twice,
lift the tip, then move the pen while keeping the tip of the pen touching the screen again.
Drag the right button (2): With the tip of the pen touching the screen, press the side switch once and release it,
then press it again quickly and move the pen.
Related INT 1Fh - Function 9B07h
INT 1Fh - Function 9B09h
Category Pen BIOS
Name Mouse emulation OFF
Undocumented
Target PC-9801P
Input AX=9B09h
Output CF=0 (normal end)
Explanation o Turns off mouse emulation.
o The mouse emulation settings in the 98Pen menu also change, so the settings remain valid even after resetting or turning the power off.
Related INT 1Fh - Function 9B07h
INT 1Fh - Function 9B08h
INT 1Fh - Function 9B0Ah
Category Pen BIOS
Name Unknown
Undocumented
Target PC-9801P
Input AX=9B0Ah
BL=Mouse button control related
bit 1: Affects the right mouse button state
bit 0: Affects the left mouse button state
CH=Mouse emulation X coordinate related
CL=Mouse emulation Y coordinate related
Output CF=0 (normal end)
Explanation o Mouse emulation related settings. Details unknown.
Related
INT 1Fh - Function 9B0Bh
Classification Pen BIOS
Name Unknown
Undocumented
Target PC-9801P
Input AX=9B0Bh
Output ES:DX=F540:058Eh
Explanation o Returns the address of some table in the Pen BIOS to ES:DX. Details unknown.
Related
INT 1Fh - Function 9B0Ch
Classification Pen BIOS
Name Get current pen status
Undocumented
Target PC-9801P
Input AX=9B0Ch
Output CF=End status
0=Pen detected (pen status output to register)
1=Pen not detected (no change in register)
AH=Pen status
bit 7:Pen on LCD
1=Not on
0=Present
bit 1:Pen side button pressed
1=Present
0=Not on
bit 0:Pen tip pressed
1=Present
0=Not on
AL=Unknown
BH=Distance between pen and screen (smaller value means closer)
BL=Unknown (usually 0 is read)
CH=Angle of pen in left-right direction (signed integer with 6-bit effective precision for numeric part)
---------------+-----------+----------+------------
Tilt direction | Left tilt | Vertical | Right tilt
---------------+-----------+----------+------------
Value | -30h | 00h | +30h
---------------+-----------+----------+------------
* Tilt the pen to the right to make it positive.
* If you tilt the pen too far, the tablet will not be able to detect it.
CL=Angle of the pen forward and backward (signed integer with 6-bit effective precision for the numerical part)
---------------+---------------+----------+--------------
Tilt direction | Backward tilt | Vertical | Forward tilt
---------------+---------------+----------+--------------
Value | -30h | 00h | +30h
---------------+---------------+----------+--------------
* Tilt the pen forward to make it positive.
* If you tilt the pen too far, the tablet will not be able to detect it.
SI=X coordinate of the pen
------------------+----------------------------+--------------------+---------------------+-----------------------------
Detection range | Left detection limit point | Left edge of glass | Right edge of glass | Right detection limit point
------------------+----------------------------+--------------------+---------------------+-----------------------------
When not inverted | -0060h | +001Ah | +0861h | +091Ch
When inverted | -00A0h | +001Ah | +0861h | +08CDh
------------------+----------------------------+--------------------+---------------------+-----------------------------
DI=Y coordinate of pen
------------------+---------------------------+--------------------+--------------------+---------------------------
Sensing range | Upper sensing limit point | Upper end of glass | Lower end of glass | Lower sensing limit point
------------------+---------------------------+--------------------+--------------------+---------------------------
When not inverted | -0060h | +0010h | +0540h | +05A6h
When inverted | -0060h | +0010h | +0540h | +05A6h
------------------+---------------------------+--------------------+--------------------+---------------------------
Explanation o When this function is executed, pen information is read from the tablet and set in the work area.
o When the pen is detected, detailed pen information is returned to each register.
If the pen is not detected, no change is made to the register.
o If this function is executed continuously, the tablet will not generate interrupts
even if the pen is detected, so be careful (see INT 1Fh - Function 9B0Eh).
o The glass dimensions are 134mm wide x 213mm long.
The tablet has a sensing range that extends to the outside of the glass.
The X coordinate can be sensed up to about 10mm to the left and 13mm to the right of the outside of the glass.
The Y coordinate can be sensed up to about 12mm above and 12mm below the outside of the glass.
o The values obtained by CH, CL, SI, and DI are approximate actual measurements.
Depending on the timing of moving the pen, this value may not be obtained at the limit point.
Related INT 1Fh - Function 9B0Dh
INT 1Fh - Function 9B0Dh
Classification Pen BIOS
Name Acquisition of pen status when pen was last detected
Undocumented
Target PC-9801P
Input AX=9B0Dh
Output CF=0 (normal end)
AH, AL, BX, CH, CL, SI, DI are the same as the output of INT 1Fh - Function 9B0Ch
Explanation o Returns the status when the pen was last detected.
o The tablet interrupt (INT 0Eh) that occurs periodically when a pen is detected, or the
tablet information acquisition routine executed within the INT 1Fh - Function 9B0Ch processing routine,
reads the value set in the work area and returns it to the register.
o This function cannot tell whether the pen is currently being detected.
Related INT 1Fh - Function 9B0Ch
INT 1Fh - Function 9B0Eh
Classification Pen BIOS
Name Set user routine when pen is detected
Undocumented
Target PC-9801P
Input AX=9B0Eh
ES:DX=User routine when pen is detected
* Set 0000:0000h to cancel user routine call
Output CF=0 (normal end)
Explanation o Defines the user routine called from INT 0Eh (tablet interrupt).
To cancel the call, set ES:DX=0000:0000h.
o When entering the user routine, AH, AL, BX, CH, CL, SI, and DI contain the same data as the output of INT 1Fh - Function 9B0Ch.
o When the tablet detects the pen, INT 0Eh is generated at the cycle specified by
INT 1Fh - Function 9B04h. However, if INT 1Fh - Function 9B0Ch is executed continuously, the tablet will no longer generate interrupts.
Related INT 1Fh - Function 9B04h
INT 1Fh - Function 9B0Ch
INT 0Eh (External interrupt...98Pen)
■NOTE-related BIOS
INT 1Fh - Function 9Ch Subfuncion 00h
Classification ??? BIOS
Name Save software dip switch
Undocumented
Target PC-9801NL/NS/T/US
Input AX=9C00h
Output CF=0
Explanation o Saves the contents of the software dip switches set in I/O 841E-8F1Eh to the unused external character area (JIS kanji code 7620h).
When this function is executed, the current settings of I/O 841E-8F1Eh can be set as the default for the next reset (excluding PC-9801US).
Related I/O 841E-8F1Eh
INT 1Fh - Function 9Ch
Classification ROM drive BIOS
Name Bulk read from ROM drive patch area
Undocumented
Target PC-98LT/HA
Input AH=9Ch
ES:BX=Destination address
DX=Source address of patch area
CX=Number of bytes transferred
Output CF=End condition
1: SRAM checksum is abnormal
0: SRAM checksum is normal
Explanation o The contents of the ROM drive patch area in the battery-backed SRAM are read in bulk to main memory.
Related INT 1Fh - Function 9Dh
INT 1Fh - Function 9Dh Subfunction 00h,01h
Classification ROM drive BIOS
Name ROM drive write protection setting
Undocumented
Target PC-9801NL
Input AH=9Dh
AL=write protection setting
00h: Write protect
01h: Make writable
Output CF=0 (normal end)
Explanation o Sets the write protection for the ROM drive.
Related INT 1Fh - Function 95h
0000:045Ch bit 3
INT 1Fh - Function 9Dh Subfunction 02h
Classification ROM drive BIOS
Name Transfer of ROM drive patch information
Undocumented
Target PC-9801NL
Input AX=9D02h
Output CF=0
Explanation o Transfers all ROM drive patch information to NOTE bank RAM (bank numbers AEh, AFh) at once.
o ROM drive patch information is transferred from SRAM to NOTE bank RAM when the system starts up.
When reading the ROM drive, the contents transferred to NOTE bank RAM are referenced.
When this function is executed, a transfer from SRAM to NOTE bank RAM is performed. The purpose is unknown.
Related INT 1Fh - Function 95h
INT 1Fh - Function 9Dh
Classification ROM drive BIOS
Name Bulk write to patch area for ROM drive
Undocumented
Target PC-98LT/HA
Input AH=9Dh
ES:BX=Source address
DX=Destination address of patch area
CX=Number of bytes transferred
Output CF=0
Explanation o Writes the contents of main memory in a batch to the patch area for ROM drive in battery-backed SRAM.
Related INT 1Fh - Function 9Ch
INT 1Fh - Function 9Eh Subfunction 00h,01h
Classification Power save BIOS
Name Power OFF prohibition control
Undocumented
Target PC-9801NL
Input AH=9Eh
AL=Power OFF permission/prohibition specification
00h: Allow power OFF
01h: Prohibit power OFF
Output None
Explanation o Increment 0000:0456h when AL=01h.
Decrement 0000:0456h when AL=00h.
Power OFF is permitted only when 0000:0456h is 00h. In other words, power OFF is possible when
the number of times Subfunction 01h and 00h are called is equal.
Power OFF by INT 1Fh - Function 98h is also prohibited.
Related INT 1Fh - Function 98h
0000:0456h
INT 1Fh - Function 9Eh Subfunction 02h,03h
Class Power save BIOS
Name Disable/enable transition to power save mode
Undocumented
Target PC-9801NL･NS/T･NS/R･P･NX/C･NS/A･NL/R, PC-9821Ne
Input AH=9Eh
AL=Transition to power save mode
02h: Enable
03h: Disable
Output None
Explanation o Disable/enable automatic transition to power save mode.
u In the PC-9801NS/T, the meaning of the subfunction number is reversed.
AL=02h disables, AL=03h enables.
Related 0000:045Ch bit 1
INT 1Fh - Function 9Eh Subfunction 04h
Classification Power save BIOS
Name Reset timer for power save mode transition
Undocumented
Target PC-9801NL
Input AX=9E04h
Output None
Explanation o Resets the timer that measures the time until entering power save mode.
Related I/O 08F0h - 0045h
■PC-98LT･HA SRAM BIOS
INT 1Fh - Function 9Eh
Classification SRAM BIOS
Name SRAM checksum inspection
Undocumented
Target PC-98LT･HA
Input AH=9Eh
Output CF=End condition
1: Checksum abnormal
0: Checksum normal
Explanation o Inspects SRAM checksum.
Related INT 1Fh - Function 9Fh
INT 1Fh - Function 9Fh
Classification SRAM BIOS
Name SRAM checksum setting
Undocumented
Target PC-98LT/HA
Input AH=9Fh
Output CF=0
Explanation o Updates the SRAM checksum data.
Execute after rewriting the contents of SRAM.
Related INT 1Fh - Function 9Eh
References TheBASIC'92/6-p.113 (c)enjo